Molding-machine.



A. W. TANNER. MOLDING MACHINE.- APPLICATION FILED APR. z, 1916s,

191 289035 Patented Dec. 29, 191%l @A uw f @v/@7% 'E @Mommy oEEioE. y

ALFRED W. TANNER, OF ROCK ISLAND, ILLINOIS. 'i

HOLDING-MACHINE.

Specication of Letters Patent.

Patented Dec. 29, 1914.

Application met April a, 191e. serial m., 553,024. l

To all whom 'it may concern Be it known that I, ALFRED W. TANNER, a

citizen of the United States, residing at Rock Island, in the county ofRock Island and State of Illinois, have invented certain new and usefulImprovements in Molding-Machines; and I do hereby declare the followingto be a full, clear, and exact description of the in' vention, suchas'will enable others skilled in the art to which it appertains to makeand use the same.

This invention relates to improvements in molding machines, andparticularly to compressed air machines for closely packing and moldingsand around the pattern orf mold in a flask. y

The object in view is the provision of a plurality of associated meansfor packing sand around a pattern or mold `by the use of compressed airwhich forces the sand properly in place and causes a proper distributionof the-same.

A-further object of the invention is the arrangement in a machine of theclass de? scribed of a hopper provided with a pivotally mounted nozzleand a feeding screw located in the hopper for forcing' sand into .thenozzle, in combination with air feeding means for mixin with the sandduring the discharge thereo so as to cause the sand to pack in the flaskproperly around the pattern.

With these and further objects in view, the invention comprises certainnovel constructions, combinations and arrangements of parts as will behereinafter more fully deyscribed and claimed. 4

In the accompanying drawingsr-Fl ure 1 is a side elevation of anembodiment o the invention. Fig. 2 is a vertical sectional view througha hopper, nozzle and surrounding parts embodying certain features of the1nvention.

l In forming a molding machine embodying the invention the same isprovided witha hopper, containing sand to which hopper is connected apivotally mounted. 'nozzle having any desired kind of opening therein.This nozzle is mounted so as to move in any direction so as to cause thedischarge of sand from the hopper to any point in a iiask placed nearthe nozzle. In the hopper is varranged a feeding screw for positivelyforcing or feeding sand into the nozzle. In ad- Vdition to the screw forfeedin the sand into the nozzle a tube is' passe through the shaft ofthe sand feeding screw and into a short distance of the nozzle forproviding an air blast'for the sand in order that the ,sand may beproperly packed around the pattern 1n the flask. A compressed air tankis'provided for maintaining any desired air pressure for the air pipeleading tothe discharge snozzle and also for providing pressure for,

a hand nozzle which is used as an auxiliary means for blowing of anyloose sand or foreign substance that may be in, or on-the mold, at anypoint desired.

In order that the invention may be more clearly understood, anembodiment of the same is shown in the accompanying drawings in which- 1indicates a hopper for containing sand. This hopper may be of anydesired slze, but is preferably formed conical and merges into adischarge pipe 2 having a partiglobular enlargement Sover which lits asimilar enlargement 4 of nozzle 15.

This

arrangement of nozzle aridV enlargements provides a universal jointarrangement for the nozzle in order that the same ma be moved as desiredfor directing and pac g sand in liask 6.

Mounted in hopper 1 isa feeding screw 7 which tapers approximately proortionately to the taper of hopper 1 an is designed to stir the sand inhopper 1 and to.

force the same in a steady stream into pipe 2 and from thence out nozzle5. In order that screw 7 may be moved or rotated, the shaft 8 thereofhas secured thereto a gear 9 which meshes with gear 10. Gear 10 iscarried by shaft 11 which receives power through a belt 12 and pulley13. When screw 7 is not working belt 12 is shifted to the idler 14 sothat the various parts will not be under any strain or tension. In orderto shift belt ,12 treadles 15 and 16 areprovided which are connected tobelt shifter 17 by means of cables or ropes 18 and 19. These cables orropes pass over suitable pulleys 20 and 21 and are connected to beltshifter 17 in any desired manner for' causing the same to slide in itssupports 22 and 23. B this arrange- 'ment whenever it is desire to feedsand from hopper 1 treadle 16 is depressed for moving -belt 12 to pulley13. When this is done power istransmitted through the lmechanism aboveset forth toscrew 7 for causing the same to force the sand into n'ozzle5 and from thenceinto ask 6. At the same time that screw7 is placed inopera- 8 of sc1ew7 and downwardly to near the lower. end of pilpe 2 formixing the sand just previously to t e discharge of the same for causingthe sand to be sprayed and packed tightly about the pattern or mold' inthe flask, If for any reason there should .be any loose'sand or foreignsubstance in, or

on the mold, air may be turned Aon at 29 for 4sl'ipplying" compressedair to pipe 30,w hc'h air `will be discharged out lof nozzle A3l andthereby remove 'said loose sand. or foreign. substance.

Pipe 30 is' a flexible pipe and may be of any desired length, so thatnozzle 31 may be manually moved about ilask 6 for blowing olf loosevsand or foreign substances.

Tank is maintained supplied with com.- pressed air by a suitable pump32, but obviolisly if Ithere is an air lin'e available, p'r jss uretherefrom 'can be utilized in lieu Y of the tank and pump.

In testimony whereof'I aliix my in presence oftwo witnesses. vthe @1a-ssdescribed, a ALFRED wrTANNER,

` sand containing hopper, a nozzlehavihg a i universal joint connection`with the lower portion of the hopper, a'positive lmechanica l feed forforcinglthe sandl from the hop- 4per into the nozzle, means fordischarging compressed air longitudinally centrally through the nozzleduring the delivery of sand Itherethrou h, the hopper and nozzle beingdisposed n' the feeding of the sand through the nozzle by gravity, andmeans supplemental to the air supplypipe for delower portion of thehopper-,a screw, within the hopper, means forl rotating the screw formechanically forcing sand downwardly in the hopper' 'tdw'ard the nozzlethereof, the screw-being axially tubular, and means for deliver-in -airunder pressure through the screw ang'delivering the sand into the nozzleaxially thereof at a point .below the lo'wer end of the -screw.

Y Witnesses: n

R. U. BAUGHMAN, `F. W. JoHNsoN.

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